ndee

Hello I converted a lot of mp3s from 128bitrate to 192 bitrate and now a all of them only play the first note of a mp3 file and then goes silent....is there a method to reset the file? and what'd I do wrong? The conversion was to mp3 at 129 bitrate on win7.....switch put a .pls file from all songs to the folder. i think the size of the mp3 files are correct but no sound. i need some help to fix his problem....i need my mp3s for work....and yes i have no backup and no recoverypoint...:-(